"Ishihara plate" meaning in English

{
  "etymology_text": "Designed by Dr. Shinobu Ishihara at the University of Tokyo, who first published his tests in 1917.",
  "forms": [
    {
      "form": "Ishihara plates",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Ishihara plate (plural Ishihara plates)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Any of a set of colored plates each containing a pattern of dots of various colors and sizes, forming a number or shape clearly visible to those with normal color vision; used in testing for color blindness."
      ],
      "id": "en-Ishihara_plate-en-noun-DCQnRn50",
      "links": [
        [
          "color blindness",
          "color blindness"
        ]
      ],
      "related": [
        {
          "word": "Ishihara test"
        }
      ]
    }
  ],
  "word": "Ishihara plate"
}

{
  "etymology_text": "Designed by Dr. Shinobu Ishihara at the University of Tokyo, who first published his tests in 1917.",
  "forms": [
    {
      "form": "Ishihara plates",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Ishihara plate (plural Ishihara plates)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "Ishihara test"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms borrowed from Japanese",
        "English terms with non-redundant non-automated sortkeys"
      ],
      "glosses": [
        "Any of a set of colored plates each containing a pattern of dots of various colors and sizes, forming a number or shape clearly visible to those with normal color vision; used in testing for color blindness."
      ],
      "links": [
        [
          "color blindness",
          "color blindness"
        ]
      ]
    }
  ],
  "word": "Ishihara plate"
}